EP2035660B1 - Dispositif de roulement à rouleaux - Google Patents

Dispositif de roulement à rouleaux Download PDF

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Publication number
EP2035660B1
EP2035660B1 EP07726991A EP07726991A EP2035660B1 EP 2035660 B1 EP2035660 B1 EP 2035660B1 EP 07726991 A EP07726991 A EP 07726991A EP 07726991 A EP07726991 A EP 07726991A EP 2035660 B1 EP2035660 B1 EP 2035660B1
Authority
EP
European Patent Office
Prior art keywords
roller
hollow
cylindrical element
securing element
hollow cylindrical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP07726991A
Other languages
German (de)
English (en)
Other versions
EP2035660A1 (fr
Inventor
Mathias PFLÜGL
Karsten Staab
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Continental Automotive GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2035660A1 publication Critical patent/EP2035660A1/fr
Application granted granted Critical
Publication of EP2035660B1 publication Critical patent/EP2035660B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers
    • F01L2305/02—Mounting of rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Definitions

  • the invention relates to a roller bearing device which can be used for example as a roller tappet in a roller tappet pump.
  • roller ram pumps are used, for example, in internal combustion engines, in particular in diesel internal combustion engines for generating high pressure in the fuel supply.
  • High pressure pumps in internal combustion engines for example, can be driven by a camshaft to impose high pressure cylinders of the high pressure pump a predetermined stroke. The survey of the respective cam of the camshaft is transmitted in these cases via the roller tappet on the high pressure piston of the high pressure pump.
  • a roller tappet is known with a cylindrical guide body having two bearing parts for holding an axle on which a roller is rotatably mounted.
  • the bearing parts have two upwardly open bearing troughs, are inserted in the axle ends of an axle on which the roller is rotatably mounted.
  • a recess in the roller tappet is formed so that the roller is axially fixed.
  • a plunger known with a plunger, which carries an axially and radially guided role.
  • the plunger has a roller shoe, in which the roller is rotatably inserted with axial play.
  • a roller shoe of the plunger takes in a recess on the role. The recess of the roller shoe tapers towards a lower edge of the roller shoe so that falling out of the roller from the roller shoe is prevented.
  • a roller tappet known with a main body, a roller and a roller body mounted in the main body for the roller.
  • the angular range in which the roller axle is mounted in the base body is a maximum of 180 °.
  • means are provided which fix the roller axis relative to the base body in the axial direction of the base body and which consist of a sheet metal cage which is clamped onto the base body and has the tabs which engage around the axis in partial areas.
  • a piston pump for high-pressure fuel supply known with a plunger, which has at its radially inner region a reversible roller, which is supported against rolling against a drive shaft of the piston pump in the region of the elevations in the circumferential direction.
  • roller tappet with a cage holder wherein the roller tappet comprises a roller shoe, in which a roller is guided in a form-fitting manner, via which the roller tappet bears against a cam ring.
  • the roller shoe On a holding element.
  • the publication EP 0 770 763 A as well as the publication US 5 566 652 A , respectively disclose a roller bearing device having a hollow cylindrical member in which a roller is supported in bearings transverse to a central axis of the hollow cylindrical member. Furthermore, a securing element is provided, which is designed and arranged to be in an inner space of the hollow cylindrical member is positively coupled to the hollow cylindrical member with respect to an axial and rotational direction on the central axis of the hollow cylindrical member, and fixes the roller at its end sides axially of the central axis of the roller.
  • the object of the invention is to provide a roller bearing device which is simple and reliable, and subject to minimized wear.
  • the invention is characterized by a roller bearing device with a hollow cylindrical element in which a roller is mounted transversely to a central axis of the hollow cylindrical member in bearings.
  • a securing element is provided, which is designed and arranged such that it is positively coupled in an interior of the hollow cylindrical element with respect to a central axis of the hollow cylindrical member and rotational direction with the hollow cylindrical member and that the roller at its end faces axially to the Central axis of the roller fixed.
  • the securing element is designed and arranged such that it is in the interior the hollow cylindrical element is positively coupled to the hollow cylindrical element with respect to the axial and rotational direction on the central axis of the hollow cylindrical element, an outer region of the hollow cylindrical element being kept substantially free of the securing element and thus used, for example, as a running surface and in this context advantageously for supporting Side forces are used. In this way, a lower surface pressure in the tread area can be ensured, which is advantageous in terms of the running properties.
  • the securing element is designed and arranged such that it is coupled to the roller in the region of the centers of the end faces. This way a can Sliding friction between the fuse element and the roller can be kept very low.
  • the securing element is designed and arranged so that it secures the role in the direction of the central axis of the hollow cylindrical member before leaving the camp. In this way, especially in connection with an open storage loss of the role can be prevented. This can otherwise take place due to in the operation of the roller bearing device, in particular in connection with a drive shaft designed as a camshaft, negative resulting contact forces, caused by corresponding inertia forces.
  • the securing element is formed wire-shaped at least in the area in which it covers the end faces of the roller. This allows a particularly simple production of the securing element and a particularly simple realization of the desired geometry, at least in the area in which it covers the end face of the roll.
  • the securing element is also formed wire-shaped outside of the region of the end faces of the roller, it may thus have particularly easy suitable resilient properties.
  • the securing element is designed so resilient that it is automatically clamped in the interior of the hollow cylindrical member. In this way, a particularly simple fixation of the securing element in the interior of the hollow cylindrical member is made possible.
  • a groove is formed in the interior of the hollow cylindrical element, in which engages the securing element.
  • the securing element can be particularly positively coupled with respect to the axial axis of the hollow cylindrical member in a form-fitting manner with the hollow cylindrical member.
  • the securing element is positively coupled in a region of a passage through a wall of the hollow cylindrical member with respect to the rotational direction of the central axis of the hollow cylindrical member direction with the hollow cylindrical member.
  • the securing element is provided with tabs which are arranged in the interior of the hollow cylindrical member and via which a force for elastic deformation of the securing element for mounting in the hollow cylindrical member can be initiated. In this way, a particularly simple mounting of the securing element in the hollow cylindrical element is made possible.
  • the tabs are formed so that they secure the role in the direction of the central axis of the hollow cylindrical member before leaving the camp. In this way, the tabs can be used advantageously both with regard to the assembly and beyond, will secure the role from leaving the bearings.
  • a roller bearing device (see FIG. 1 ) has a hollow cylindrical element 1.
  • the hollow cylindrical member is coupled to a piston, such as a high pressure pump, as used in internal combustion engines.
  • the hollow cylindrical element 1 has a wall 2.
  • a roller 4 is provided, which is formed roller-shaped.
  • the roller 4 is mounted transversely to a central axis 6 of the hollow cylindrical element 1 in bearings 8, 10, which are formed in the wall 2 of the hollow cylindrical element 1.
  • the bearing 8 encloses the roller by more than 180 °, for example 200 °.
  • the roller 4 is secured against leaving the bearings 8, 10.
  • the bearings 8, 10 may also be designed to comprise the roller by less than or equal to 180 °.
  • the roller 4 is preferably in contact with a camshaft and rolls on this or on the cam arranged on it.
  • the stroke of the respective cam of the camshaft can thus be transmitted, specifically to a piston of the high-pressure pump.
  • a securing element 12 is provided, which is designed and arranged such that it is positively coupled in the interior 14 of the hollow cylindrical element 1 with respect to a central axis 6 of the hollow cylindrical member 1 axial and rotational direction with the hollow cylindrical member 6 and that it is the role 4 fixed at its end faces 16, 18 axially to a central axis 20 of the roller 4.
  • the securing element 12 is designed to be wire-shaped at least in the region in which it covers the end faces 16, 18 of the roller 4.
  • the securing element 12 is designed so that it is coupled in the region of the center 22 of the end face 16, 18 of the roller 4 with the roller.
  • it has a suitable geometry, for example, in the FIG. 1 shown is.
  • a spring wire is particularly well, since by means of this geometry such a geometry is particularly easy to produce.
  • the securing element 12 is guided from the inner space 14 through the wall 2 in the region of a passage 26 through the wall 2 of the hollow cylindrical element 1.
  • the implementation is preferably designed so that they in cooperation with a corresponding to the implementation of corresponding shaping of the fuse element 12, as for example from the FIG. 2 it can be seen, a positive coupling between the securing element 12 and the hollow cylindrical member 1 with respect to the direction of the central axis 6 of the hollow cylindrical member 1 rotatory direction allows.
  • a certain clearance between the roller and the securing element 12 in the region of the passage 26 is preferably provided. In this way, in particular an undesirable friction in this area between the securing element 12 and the roller 4 can be avoided and also a simple mounting of the securing element 12 favors.
  • a groove 24 is formed in the wall 2, in which the securing element 12 engages.
  • the securing element 12 is designed such that it biases itself automatically when it is arranged in the interior 14 of the hollow cylindrical element 1.
  • it is preferably provided by its geometry in this context with suitable elastic properties. This can be supported for example by suitably formed tabs 28, 30, 32. In this way, in the intended arrangement of the securing element 12, it is then braced automatically in the interior 14 of the hollow cylindrical element 1.
  • the tabs 28, 30, 32 are also preferably designed so that a force for the corresponding deformation of the securing element 12 can be introduced via them during assembly that the securing element 12 in the axial direction with respect to the central axis 6 of the hollow cylindrical member 1 in this is insertable until it engages in the groove 24.
  • the angle by which the bearings 8, 10 enclose the roller 4 does not exceed 180 °
  • the roller 4 in the direction of the central axis 6 of the hollow cylindrical member 1 before leaving the bearings 8, 10 to be secured are preferably formed correspondingly longer and in such a way that they cover the role 4 suitable.
  • the securing element 12 is preferably formed completely from a wire. However, it may also be formed at least partially by means of suitable other elements, it may be formed for example in the interior 14 by corresponding sheet metal elements. However, any further embodiments of the securing element 12 are conceivable.
  • the bias of the fuse element 12 is preferably interpreted as, in particular, if they should realize a backup for the role before leaving the camp in the direction of the central axis 6 of the hollow cylindrical member 1, that the inertia forces occurring during operation of the roller 4 the Can not press fuse element 12 out of his leadership.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

L'invention concerne un dispositif de roulement à rouleaux comprenant un élément cylindrique creux (1) dans lequel un rouleau (4) est logé dans des paliers (8, 10), transversalement à un axe médian (6) de l'élément cylindrique creux (1). Il est prévu un élément de fixation (12), conçu et monté de sorte à être accouplé à l'élément cylindrique creux (1) par complémentarité de forme dans l'espace intérieur (14) de l'élément cylindrique creux, par rapport à un un sens axial et rotatif sur l'axe médian (6) de l'élément cylindrique creux (1) et de manière que le rouleau (4) soit fixé dans le sens axial par rapport à l'axe médian (6), au niveau de ses faces avant (16, 18).

Claims (8)

  1. Dispositif support d'un rouleau comprenant un élément (1) en forme de cylindre creux dans lequel un rouleau (4) est supporté à rotation dans des portées (8, 10) transversalement par rapport à un axe central (6) de l'élément (1) en forme de cylindre creux et dans lequel est prévu un élément de maintien (12), qui est conformé et disposé de telle manière qu'il soit couplé par complémentarité de formes à l'élément (1) en forme de cylindre creux dans un espace intérieur (14) de l'élément en forme de cylindre creux par rapport à une direction axiale et de rotation vis-à-vis de l'axe central (6) de l'élément (1) en forme de cylindre creux, et qu'il fixe le rouleau (4) à ses surfaces frontales (16, 18) axialement par rapport à l' axe central (6) du rouleau (4),
    caractérisé en ce que
    l'élément de maintien (12) est conformé et agencé de telle manière qu'il soit couplé au rouleau (4) dans la zone des centres (22) des surfaces frontales (16, 18).
  2. Dispositif de support d'un rouleau selon l'une des revendications précédentes, dans lequel l'élément de maintien (12) est conformé et agencé de telle manière qu'il empêche le rouleau (4) de quitter les portées (8, 10) dans la direction de l'axe central (6) de l'élément (1) en forme de cylindre creux.
  3. Dispositif de support d'un rouleau selon l'une des revendications précédentes, dans lequel l'élément de maintien (12) présente une forme filaire au moins dans la zone dans laquelle il recouvre les faces d'extrémité (16, 18) du rouleau (4).
  4. Dispositif de support de rouleau selon l'une des revendications précédentes, dans lequel l'élément de maintien (12) est formé de manière élastique de telle sorte qu'il se tend de manière automatique dans l'espace intérieur (14) de l'élément (1) en forme de cylindre creux.
  5. Dispositif de support d'un rouleau selon l'une des revendications précédentes, dans lequel une rainure (24) est formée dans l'espace intérieur (14) de l'élément (1) en forme de cylindre creux, l'élément de maintien (12) s'enclenchant dans la rainure.
  6. Dispositif de support d'un rouleau selon l'une des revendications précédentes, dans lequel l'élément de maintien (12) est couplé par complémentarité de formes à l'élément (1) en forme de cylindre creux par rapport à une direction de rotation vis-à-vis de l'axe central (6) de l'élément (1) en forme de cylindre creux, dans une zone d'un passage (26) ménagé dans une paroi (2) de l'élément (1) en forme de cylindre creux.
  7. Dispositif de support d'un rouleau selon l'une des revendications précédentes, dans lequel l'élément de maintien (12) est pourvu de pattes (28, 30, 32) qui sont disposées dans l'espace intérieur (14) de l'élément (1) en forme de cylindre creux et par l'intermédiaire desquelles une force engendrant la déformation élastique de l'élément de maintien (12) en vue de son montage dans l'élément (1) en forme de cylindre creux (1) peut être appliqué.
  8. Dispositif de support d'un rouleau selon la revendication 7, dans lequel les pattes (28, 30, 32) sont conformées de telle manière qu'elles empêchent le rouleau (4) de quitter les portées (8, 10) selon la direction de l'axe central (6) de l'élément (1) en forme de cylindre creux.
EP07726991A 2006-06-20 2007-03-16 Dispositif de roulement à rouleaux Expired - Fee Related EP2035660B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006028348A DE102006028348B3 (de) 2006-06-20 2006-06-20 Rollenlagerungsvorrichtung
PCT/EP2007/052512 WO2007147654A1 (fr) 2006-06-20 2007-03-16 Dispositif de roulement à rouleaux

Publications (2)

Publication Number Publication Date
EP2035660A1 EP2035660A1 (fr) 2009-03-18
EP2035660B1 true EP2035660B1 (fr) 2010-03-03

Family

ID=38421503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07726991A Expired - Fee Related EP2035660B1 (fr) 2006-06-20 2007-03-16 Dispositif de roulement à rouleaux

Country Status (6)

Country Link
US (1) US8522739B2 (fr)
EP (1) EP2035660B1 (fr)
JP (1) JP5175279B2 (fr)
CN (1) CN101473109B (fr)
DE (2) DE102006028348B3 (fr)
WO (1) WO2007147654A1 (fr)

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Also Published As

Publication number Publication date
DE102006028348B3 (de) 2007-10-31
US20100064844A1 (en) 2010-03-18
JP5175279B2 (ja) 2013-04-03
EP2035660A1 (fr) 2009-03-18
DE502007003025D1 (de) 2010-04-15
JP2009541671A (ja) 2009-11-26
WO2007147654A1 (fr) 2007-12-27
US8522739B2 (en) 2013-09-03
CN101473109B (zh) 2012-01-18
CN101473109A (zh) 2009-07-01

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